General Information (Main Pump System)
The main hydraulic pump is a variable displacement piston pump. The engine directly powers the pump through a mechanical connection to the engine flywheel.
The pump regulators are controlled by the electronic control system. The electronic control system sends a hydraulic signal to the pump regulators to control the output flow of the pump.
Note: Refer to the appropriate sections in this manual for more information.
Caterpillar Information System:
320 GC, 320, and 323 ExcavatorTA2 Technical Inspection {0372, 1000, 7000, 753T, 7565} 320 GC, 320, and 323 ExcavatorTA2 Technical Inspection {0372, 1000, 7000, 753T, 7565}
140 Motor Grader Engine Supplement Enclosure (Cooling System Package) - Remove and Install
140 Motor Grader Machine Systems Window Wiper and Wiper Motor (Rear) - Remove and Install
320 GC, 320, and 323 Excavator TA2 Technical Inspection {0372, 1000, 7000, 753T, 7565} 320 GC, 320, and 323 Excavator TA2 Technical Inspection {0372, 1000, 7000, 753T, 7565}
3412C Generator Sets Maintenance Interval Schedule - Prime
140 Motor Grader Systems Electronic Control (Fan Hydraulic System)
New Engine Software are Now Used on Certain 3512C and 3516C Engines {1920} New Engine Software are Now Used on Certain 3512C and 3516C Engines {1920}
140 Motor Grader Machine Systems Wheel Lean Cylinder - Remove and Install
140 Motor Grader Machine Systems Window Wiper and Wiper Motor (Front) - Remove and Install
C9.3B Industrial Engines Exhaust Manifold - Install
307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavator Machine Systems Blade Cylinder - Remove and Install
307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavator Engine Supplement System Pressure - Release
307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavator Machine System Electronic Control (Main Pump System)
The Differential and Bevel Gear Group are Improved on Certain 797 Off-Highway Trucks {3256, 3258, 3281} The Differential and Bevel Gear Group are Improved on Certain 797 Off-Highway Trucks {3256, 3258, 3281}
307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavator Machine System Main Hydraulic Pump
C9.3B Industrial Engines Inlet Manifold - Remove
140 Motor Grader Machine Systems Wheel Lean Cylinder - Remove and Install
140 Motor Grader Machine Systems Window Wiper and Wiper Motor (Front) - Remove and Install - Lower
New Flywheel Assembly is Now Available on Certain C9.3 Industrial Engines {1156} New Flywheel Assembly is Now Available on Certain C9.3 Industrial Engines {1156}
797F Tier 4 Off-Highway Truck Field Assembly Introduction
336 and 336 GC Excavator Engine and Machine Warm-Up
New Oil Mist Set Point is Now Available for Certain 3500E Tier 4 Marine Engines {1336, 7490} New Oil Mist Set Point is Now Available for Certain 3500E Tier 4 Marine Engines {1336, 7490}
307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavator Machine Systems Hydraulic Tank - Remove and Install
307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavator Machine Systems Bucket Linkage - Remove and Install